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P0850 Nissan Code - Park/Neutral Switch

Quick Answer

The P0850 diagnostic trouble code (DTC) for Nissan vehicles refers to an issue with the Park/Neutral Switch, also known as the Transmission Range Sensor or Neutral Safety Switch. Common causes include Failed Park/Neutral Switch, Damaged or corroded wiring/connectors in the switch circuit, Malfunctioning transmission control module. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0850 Nissan indicates Park/Neutral Switch.
Common causes
Common causes include Failed Park/Neutral Switch, Damaged or corroded wiring/connectors in the switch circuit, Malfunctioning transmission control module.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P0850 Nissan Description

The P0850 diagnostic trouble code (DTC) for Nissan vehicles refers to an issue with the Park/Neutral Switch, also known as the Transmission Range Sensor or Neutral Safety Switch. This switch is responsible for detecting the position of the gearshift lever and informing the vehicle's computer whether the transmission is in Park or Neutral. When this code is triggered, it indicates that there is a malfunction in the switch or its circuitry.

OBDII Code P0850 Nissan - Park/Neutral Switch
P0850 Nissan Code - Park/Neutral Switch

Common Causes of P0850 Nissan

  1. Failed Park/Neutral Switch.
  2. Damaged or corroded wiring/connectors in the switch circuit.
  3. Malfunctioning transmission control module.
  4. Faulty gearshift lever position sensor.
  5. Electrical issues such as blown fuses or relay problems.

Symptoms of P0850 Nissan

  1. Difficulty starting the vehicle or intermittent starting problems.
  2. Inability to shift the transmission out of Park or into certain gears.
  3. The engine may stall when shifting into or out of gear.
  4. Malfunctioning cruise control system.
  5. Backup lights not working properly.

How to Fix P0850 Nissan

  1. Begin by diagnosing the specific cause of the P0850 code using a diagnostic scanner to pinpoint the issue accurately.
  2. Inspect the Park/Neutral Switch and its wiring/connectors for any signs of damage or corrosion. Replace any faulty components.
  3. Test the transmission control module and gearshift lever position sensor for proper operation. Replace if necessary.
  4. Clear the DTC from the vehicle's computer memory using the diagnostic scanner.
  5. Test drive the vehicle to ensure that the issue has been resolved and that the code does not reappear.

Cost to Fix P0850 Nissan

The typical repair costs for addressing a P0850 code may range from $150 to $400, depending on the specific cause of the issue and the parts/labour required for the repair. It is important to note that these estimates can vary based on factors such as location, vehicle make and model, and engine type. Additionally, the diagnosis time and labour rates at auto repair shops can also impact the overall cost of the repair. It is advisable to consult with a professional mechanic or local auto repair shop for a more accurate estimate based on the individual circumstances.

When is the Code Detected?

The signal of the park/neutral position (PNP) switch is not changed in the process of engine starting and driving.

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Information for Specific Nissan Models

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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